No one was injured in the blaze, which began on the eighth floor of the building known as "The Round House." The radio facility, built in 1963, was undergoing renovations, and was not being used by radio personnel, the Associated Press reported.

President Francois Hollande, in the midst of a press conference with Turkish President Recep Erdogan, interruped the event to chime in on the fire.

"The damage appears considerable," he said, calling the blaze "a great shock."